[This article belongs to Volume - 54, Issue - 02]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-09-12-2022-540

Title : AN ENERGY EFFICIENT CONTROLLER AND LLC RESONANT DC-DC CONVERTER TOPOLOGIES FOR CONTROLLING THE SPEED OF BLDC MOTOR
G. Merlin Suba, M.Kumaresan

Abstract :

Controlling the speed of Brushless DC (BLDC) motor is one of the demanding and essential research topic in ancient times. Because, the BLDC motor has been increasingly used in many application domains due to its significant advantages and features. The main intention of this paper is to implement an advanced DC-DC converter and controlling topologies for controlling the speed of BLDC motor with increased efficiency. Here, the performance of resonant DC-DC converter is validated and tested with two distinct switches such as Si and SiC MOSFET for providing an appropriate voltage support to power the motor. In this work, the DSP is separately programmed to transmit the appropriate pulses to the MOSFET switches of converters. Then, the effectiveness and performance of both Si and SiC switches used in the resonant converters are validated in terms of output parameters, efficiency, and speed of motor. Due to the tiny stator inductance, the high speed BLDC motor has an increased harmonic distortions in the winding currents, which increases the motor losses. Hence, the proposed work objects to increase the switching frequency of Pulse Width Modulation (PWM) by using the sine wave filter, where the SiC MOSFET converter is used to obtain high voltage gain. During experimentation, the microcontroller has been designed and optimized by using the SiC MOSFET driving circuit. Moreover, the performance of both SiC MOSFET and Si IGBT are validated and compared by using various evaluation indicators. The obtained results indicate that the SiC MOSFET used in the resonant converters provide an increased switching frequency and controlling speed.